ON THE MIDDLE AND UPPER CARBONIFEROUS OF THE EUROPEAN PART OF THE USSR.BARKHATOVA VP; KRUCHININA ON; LYUBER AA et al.1970; COMPTE.RENDU.6EME.CONG.INTERN.STRATIGR.ET.GEOL.DU.CARBONIFERE.; 1970, VOL. 2, P. 453 A 457Miscellaneous

FLORAL AND FAUNAL CHANGES IN NON-MARINE FACIES AT THE PERMIAN-TRIASSIC BOUNDARY, U.S.S.R.RADCZENKO GP; RADCHENKO GP; LYUBER AA et al.1973; CANAD. SOC. PETROLEUM GEOLOGISTS, MEM.; CANADA; DA. 1973; NO 2; PP. 655-661; BIBL. 3 REF.; (PERMIAN-TRIASSIC SYST. MUTUAL BOUNDARY. INT. PERMIAN-TRIASSIC CONF.; CALGARY; 1971)Conference Paper